Enjoy your daily run with the Nike Dri-FIT Miler top. This lightweight top offers freedom of movement ideal for beginner runners. This product is made with at least 50% recycled polyester fibers, and the newly developed corrugated yarn material allows air to circulate for maximum coolness. The soft feel reduces the risk of chafing during your runs.shoulder seams are rolled back to allow for greater freedom of movement in the arms. Dri-FIT technology keeps you dry and focused, while providing maximum comfort.